12 Rahul, an engineering student, prepared a model shaped like athecylinder with two cones attached at its two ends. The diameter ofmodel is 3 cm and its length is 12 cm. Ifeach conical part has a heightof 2 cm, find the () volume of air contained in Rahul's model(assume the outer and inner dimensions of the model to be nearlytsame), (ii) cost of painting the outer surface of the model atR 12.50per cm3

12 Rahul, an engineering student, prepared a model shaped like athecyl

1.	12 Rahul, an engineering student, prepared a model shaped like athecylinder with two cones attached at its two ends. The diameter ofmodel is 3 cm and its length is 12 cm. Ifeach conical part has a heightof 2 cm, find the () volume of air contained in Rahul's model(assume the outer and inner dimensions of the model to be nearlytsame), (ii) cost of painting the outer surface of the model atR 12.50per cm3
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